Large area projection liquid-crystal video display system with inherent grid pattern optically removed
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United States of America Patent
Stats
-
Nov 3, 1992
Issued Date -
N/A
app pub date -
Dec 21, 1990
filing date -
Sep 30, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A relatively small and low-cost system is provided for projecting a large and bright television image onto a screen. A minature liquid crystal array is driven by video circuitry to produce a pattern of transparencies in the array corresponding to a television image. Light is directed against the rear surface of the array to illuminate it, while a projection lens lies in front of the array to project the image of the array onto a large screen. Grid lines in the liquid crystal array are eliminated by a spacial filter which comprises a negative of the Fourier transform of the grid.
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Family
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Cited Art Landscape
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